Electric secondary battery.



` B. RABBIDGB. ELECTRIC SECONDARY BATTERY.

APPLICATION FILED SEPT. 20, 1907.

Patented Feb. 28, 1911.

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.'PRNELL RABBIDGE, OF NORTH SYDNEY, NEW SOUTH WALES, AUSTRALIA.

ELECTRIC SECONDARY BATTERY.

To all whom t may concern."

Be it known that I, PARNELL RAnmon, a subject of -the King of Great Britain, resid. ing at Waters Road, Neutral Bay,'North y Sydney, in the State of New South Wales,

Commonwealth of Australia, have invented an Improved Electric Secondary Battery, of

which the following is a specification.

lThis invention is adapted to be applied to secondary and to dry primary batteries in their various forms, and is specially applica` ble for use on motor ears, trains, railways and. other installations where the use of a liquid electrolyte has been proved to be detrimental, for various reasons.

In vgiving effect to the invention, an absorbent is used consisting of the residue from copra (the dried kernel of the coeoa' nut) from which the oilhas been expressed. This residual copra 1s washed, dried, ground,

and screened; it is then poured into the cell so that the pul'verized' material h'lls the spaces between and around the positive and the negative plates, and is well shaken, so

that the Apulverized material is brought into,

` with wax or other suitable agent.

In the accompanying drawing in which is shown a vertical sectional View of a battery,

Specification of Letters Patent.

application filed september 2o, 1907.

Patented Feb. 2%, 191i.,

Serial No. 393,832.

y indicates a receptacle of any suitable shape and material and havinga suitable upper closure a, and b and c represent the positive and negative plates.

e represents the pulverized absorbent which is saturated with an electrolyte and which, as shown, fills the space between the plates and also bet-Ween the plalte's and the walls of the receptacle.

When the absorbent is applied'to secondary cells, the latter may be moved about at will, and there will be no spilling, of the electrolyte, which is one of the pregnant sources ol damage with a iliquid cell. The cell or battery may also be re-charged with electricity over and over again, and will be just as, or more. effect-ive wit-h the subsequent charges as it was with the first. Conse quently, the adoption of the improved absorbent with secondary dry cells will entail nary dry primary cell, because, when the. latter has been exhausted, it is useless; it can- Anot be recharged and must, therefore, be thrown away.

What I claim as my invention is An absorbent for electric cells comprising suitably washed, screened and vdried copra, treated with a liquideleetrolyte.

In testimony whereof I have signed my name to this specification in the presence otl two subscribing witnesses.

PARNELL RABBIDGE.

Witnesses MNFIELD NEWTON, VINCENT NEWTON.

much less expense than the use of an ordi! 

